Fitzgerald employs imagery in defining the social classes, so what are the similarities between Tom Buchanan and George Wilson?

On the face of it, the two men don't seem to have much in common. Tom Buchanan is a rich, upper-class male from an established old money family. George Wilson is a struggling small business owner toiling away for little reward in the Valley of Ashes.
Yet there is one marked similarity between them: they both think it's acceptable to use violence towards women. In both cases it's the same woman, Myrtle Wilson. Though their respective motives are different. Tom is a control freak; he hits Myrtle to maintain his dominance over her; whereas George uses physical violence because he's scared that his wife is going to leave him. Violence is always there in both characters, but it takes a long time for George to express his inner rage openly, and even then it's a sign of mental derangement rather than an innate aspect of his personality, as it is with Tom.